Table 2. Diagnostic Performance of SWE and SMI in Distinguishing Malignant from Benign Masses.
| Variables | Cutoff Values | Sensitivity (%) | Specificity (%) | Accuracy (%) | PPV (%) | NPV (%) | AUC (95% CI) |
|---|---|---|---|---|---|---|---|
| Emax (kPa) | 86.45 | 71.8 (61/85) | 91.3 (105/115) | 83.0 (166/200) | 85.9 (61/71) | 81.4 (105/129) | 0.838 (0.779–0.898) |
| Eratio | 3.57 | 82.4 (70/85) | 69.6 (80/115) | 75.0 (150/200) | 66.7 (70/105) | 84.2 (80/95) | 0.813 (0.752–0.873) |
| SMIVI (%) | 3.35 | 84.7 (72/85) | 63.5 (73/115) | 72.5 (145/200) | 63.2 (72/114) | 84.9 (73/86) | 0.766 (0.700–0.833) |
Data are expressed as percentage (numbers). AUC = area under receiver operating characteristic curve, CI = confidence interval, NPV = negative predictive value, PPV = positive predictive value